/Engine/Plugins/Experimental/MeshModelingToolsetExp/Source/SkeletalMeshModifiers/Public/SkinWeightModifier.h
Strips out smallest influences to ensure each vertex does not have weight on more influences than MaxInfluences. Influences with the smallest weight are culled first.
true if influences were removed, false otherwise
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="Weights") bool EnforceMaxInfluences ( const int32 MaxInfluences )